This Sentry CT fits the 2022-2026 Toyota Tundra 6'6" box (77.6"), the length Toyota publishes, on trucks without the deck rail system. It is not compatible with the deck rail system and will not work with the Trail Special Edition storage boxes. TruXedo builds this hard roll-up from interlocking aluminum slats under patented RTxTechWeave canvas, so it rolls to the cab like a soft cover yet closes as a hard one. With a key-locking tailgate, nobody can open the cover until the tailgate is unlocked and dropped. Up to 400 lb can sit on it when the weight is spread across the deck. It clamps on; no drilling is needed on most trucks. Both the hard parts and the canvas carry TruXedo's 5-year warranty.